JPH0873095A - Paper sheet discharge device - Google Patents

Abstract

PURPOSE: To secure the stable paper sheet discharge even if the paper sheet discharge is obstructed at a discharge part, by installing a discharge cushoning means for preventing the turning moment of a motor in idling from being transmitted to the driving shaft of a discharge roller, when the paper sheet discharge is obstructed. CONSTITUTION: In printing, the top end part of a paper sheet 20 is held by the first and the second rollers 68 and 70, and the intermediate part is deflected by a paper sheet storage part, and the paper sheet 20 is stored in a curved state. When printing completes or suspends, the first discharge roller 68 is driven, and the paper sheet is discharged from a discharge port 62 by the first discharge roller 68. Further, when the paper sheet discharge is obstructed on the discharge port side, the transmissio of the driving force of a motor 26 for the first discharge roller 68 is released by a torque limitter 30, and the paper sheet discharge is cushoned. Accordingly, the jam generation due to the forcible paper sheet discharge can be prevented. When the obstruction in the paper sheet discharge is suspended, the driving force for the first discharge roller 68 restores, and the paper sheet discharge is carried out speedily, and an operator can receive the paper sheet 20.

Description

Detailed Description of the Invention [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper ejecting device which is attached to a printer device and is used for ejecting long recording paper such as printed receipts and tickets.

[0002]

2. Description of the Related Art Conventionally, a printer used as a device for issuing receipts, tickets, etc. prints on a long sheet of paper, ejects the sheet, and cuts the sheet when the printing is completed. are doing.

FIG. 21A shows the appearance of this printer device. A paper discharge port 306 is provided on the front panel 304 of the outer case 302, and the long paper 308 has a paper discharge port 306 according to the printing operation.
Emitted from. The recipient can pick up the paper 308 discharged from the paper discharge port 306 by fingers and receive it.

Next, FIG. 21B shows the internal structure of this printer device. In this printer device, a paper transport path 310 is formed from the inside of the outer case 302 toward the paper discharge port 306. In this paper transport path 310, a paper transport mechanism 312 and a printing mechanism 314.
Also, a cutter mechanism 316 is installed. The sheet transport mechanism 312 is a unit that sends out the sheet 308 in synchronization with printing. The paper transport mechanism 312 is provided with a pair of drive rollers 318 and 320.
A sheet 308 is guided between the 20 sheets, sandwiched between the sheets, and is delivered by the rotation thereof in a pressure contact state. The printing mechanism 314 is
A print head 322 and a platen 324 are arranged across the paper transport path 310, and printing on the paper 308 is performed by driving the print head 322. The form of printing is paper 3
The ink ribbon is not required when pressure-sensitive paper is used, and a coloring medium such as an ink ribbon is required when plain paper is used. Further, the cutter mechanism 316 constitutes an independent unit, inside which a cutter blade 326 that slides in the direction orthogonal to the transport direction of the paper 308 is installed. This cutter blade 326
Is driven by a sliding drive mechanism. In such a cutter mechanism 316, when the cutter blade 326 slides downward in the drawing, the conveyed paper 308 is cut.

In such a printer device, the paper 308 is used.
Is discharged from the paper discharge port 306 while being printed, and after the printing is completed, a predetermined amount is continuously discharged and the cutter blade 326 is slid to cut.

When such a printer device is used as a receipt or ticket issuing device, it is expected that the recipient waits for the completion of printing by grasping the edge of the sheet 308 to be sent out with his / her finger. It is also expected that the recipient will interfere with the ejection of paper 308. For example, in FIG.
An example of a standby state of the recipient's paper 308 is shown. That is, when the recipient holds the discharged sheet 308 and waits, the conveyance of the sheet 308 is hindered, and the sheet 308 on the sheet conveyance path 310 is bent 328. Such bending of the paper 308 causes unnecessary stress in the direction opposite to the discharge direction of the paper 308. As a result, paper 3
No. 08 is curved inside the printer in a loop shape, and a normal discharge operation cannot be performed, so that a jam occurs.

Next, FIG. 23A shows a case where the recipient tries to forcibly pull out the discharged sheet 308. When the tension T is applied to the paper 308, this tension T applies an unnecessary load to the blade edge of the cutter blade 326 in the process of cutting in the direction orthogonal to the sliding direction F.
When the load is extremely large, the cutting edge 330 of the cutter blade 326 is damaged as shown in FIG. And when the cutting edge 330 is bent,
It may not be able to slide, and the cutting operation may be impaired.

Conventionally, in such a printer device, measures are taken so that the recipient cannot touch the paper 308 until the printing or discharging of the paper 308 of a predetermined length is completed. For example, the actual Kaihei 5-2976
There is No. 5 "Printer". In this printer, a cover having a depth corresponding to the length of the paper to be issued is attached to the paper discharge section, and the paper is guided into the cover so that the recipient does not touch it. The paper is sent out from.

Such means have the following problems. Since the cover is protruding from the printer and the cover itself may be damaged, and since the size of the cover corresponds to the paper 308 to be issued, when the length of the paper 308 to be issued is changed However, a size corresponding to that is required, which leads to an increase in size of the issuing device itself.

For protection measures by such a cover,
A paper ejection device disclosed in Japanese Patent Application Laid-Open No. 1-181659 and US Pat. No. 5,215,393 has been proposed. Such a paper discharge device prevents the recipient from receiving the paper by slackening the paper in the printer and waiting until the print operation is completed in the path on the paper discharge side. Some paper is cut out and then discharged from the discharge port.

By the way, in such a sheet discharging device,
When the recipient intentionally blocks the sheet discharge port with his / her finger and stands by, there is no countermeasure in Japanese Patent Laid-Open No. 181659/1989, and if the sheet discharge is hindered, a jam occurs. Further, in US Pat. No. 5,215,393, when the sheet discharge is hindered by the discharge port, the sheet discharge is abandoned, and the sheet held in the cover is guided downward by the roller. When the paper is discharged through another route instead of the paper discharge port, there is a problem that the recipient cannot receive the paper.

Further, in such a sheet discharging device, for example, the path from the printing mechanism to the discharging side is long, and since the rollers are used for discharging the sheet, the state of the sheet or the like can be conveyed by the rollers. Influence. That is, this type of device may be installed indoors or outdoors and may be used under adverse conditions of high temperature and high humidity. A standard product is used for the paper, but even with the standard product, the paper becomes soft under high temperature and high humidity, or the paper is deformed by pressing the roller surface at a portion gripped between the rollers in contact with each other. The softened paper causes excessive friction with the roller or comes into close contact with the roller surface, making it difficult to convey.
A sheet of paper having press wrinkles on the roller surface is curved at the wrinkles, so that it is difficult to sandwich the paper between the rollers. Also,
Roll paper tends to have curl and press wrinkles, and thus prevents the paper from being caught between rollers. These cause jams. In Japanese Unexamined Patent Publication No. 1-181659, a drive lever is used to help the paper to bite into the roller, but its structure is complicated and rather causes a jam.

Therefore, the present invention provides a sheet discharging device which solves the problems caused by the state of the sheet such as weakening and can stably discharge the sheet even when the sheet discharging is obstructed by the discharging section. With the goal.

[0014]

That is, as shown in FIGS. 1 to 16, a sheet discharging device of the present invention is installed with a printer device (2) and discharges a printed sheet ( 6) which is a conveyance means (8) for conveying the paper (20) to be printed or the paper (20) being printed,
The paper is carried by the carrying means, and the leading end portion of the paper is sandwiched and held, and when the printing is completed, a discharge roller (68, 70) for discharging the paper and a paper held and conveyed by the discharge roller are provided. A paper storage means (58) for curving and storing, and a paper discharge path (60) for guiding the paper discharged by the discharge roller to the discharge port (62) side.
And a paper sensor (76) for detecting the arrival of the leading edge of the paper conveyed to the paper discharge path side by the discharge roller.
When the paper sensor detects the arrival of the paper, the motor (26) for driving the discharge roller is stopped and the paper transport means is operated to feed the paper to the paper storage means to curl the paper, thereby performing the printing operation. Upon completion, the motor is driven to eject the paper, and when the paper sensor detects that the paper is ejected, it is attached to the control means (control unit 110) and the drive shaft of the ejection roller (68). And transmits the rotational force from the motor (26) to the drive shaft, and when the sheet discharge is hindered, the sheet is discharged by idling so that the rotational force of the motor (26) is not transmitted to the drive shaft (64). And a discharge buffering means (30) for buffering.

In the paper discharge device of the present invention, the structure of the discharge roller is for sandwiching the discharged paper and is attached to the drive shaft (64) and installed below the paper discharge path. A first pair of discharge rollers (68),
A second pair of discharge rollers (70) are provided which are supported on the upper side of the sheet discharge path and are driven by the first discharge roller, and which are installed by being displaced from the first discharge roller to the sheet discharge port.

In the paper ejection device of the present invention, the paper storage means is a means for storing the bent paper in preparation for ejection, and as an example of its configuration, a first paper supporting the paper to be ejected. A guide plate (38), a second guide plate (40) installed on the upper side of the first guide plate, a side plate (24) supporting the drive shaft, and a standing wall (provided between the side plates). 56) and

Roll paper or cut paper can be used as the paper used in the paper discharge device of the present invention. When roll paper is used, the cutting means is required. Therefore, the paper discharge device of the present invention is provided with the cutting means (4) for cutting the paper on which printing is completed.

In the paper ejection device of the present invention, the ejection buffer means is a means for ejecting the paper normally. The discharge buffering means may be composed of a torque limiter (30) that blocks the movement of the discharged paper and stops the rotational force to the discharge roller.

In the paper discharging apparatus of the present invention, the cutting of the paper by the cutting means is optional, and the paper (20) may be cut entirely, or a part of the paper (20) may be left. You can go.

In the paper discharging apparatus of the present invention, the operation of the cutter blade in the cutting means is arbitrary, and for example, the cutter blade is controlled so as not to move backward until the paper discharging is completed.

In the paper ejecting apparatus of the present invention, the torque limiter for buffering paper ejection is a clutch portion (92) attached to the drive shaft, and is rotatably attached to the clutch portion to rotate from the motor (26). A gear (98) to which a force is applied and a spring (10) for transmitting a rotational force by pressing a contact portion formed on the gear with a clutch portion.
4) and are provided.

Further, in the paper discharge device of the present invention, the torque limiter is a means for pressing the gear and the clutch portion in pressure contact with each other, in addition to the spring, the clutch portion (9).
By configuring 2), the gear and the clutch portion can be coupled by the attraction force of the magnet.

[0023]

In the paper discharging apparatus of the present invention, during printing, the front end of the paper is gripped by the discharging roller, and the intermediate portion is bent in the paper storage unit and stored in a curved state. When the printing is completed and cut, the discharge roller is driven,
The sheet is ejected from the ejection port by the ejection roller.
Also, when the sheet ejection is blocked at the ejection port side, the transmission of the driving force of the motor to the ejection roller is released,
Buffer paper ejection. For this reason, it is possible to prevent jamming due to forced paper discharge. Then, when the obstruction of the sheet ejection is stopped, the driving force for the ejection roller is restored, the sheet is ejected quickly, and the recipient can receive the sheet.

In the paper discharge device of the present invention, the spread angle of the discharge roller can be set wider for the discharged paper, and as a result, the weakened or curved paper can be easily gripped. It is possible to prevent jamming before the paper is discharged.

In the paper ejection device of the present invention, the bent paper is stored in the paper storage means in preparation for ejection. The configuration is, as an example, a first guide plate that supports the sheet to be discharged, a second guide plate that is installed above the first guide plate, a side plate that supports a drive shaft, and A space is formed by the standing wall provided between the side plates,
The discharged paper is stored in the space.

In the paper ejection device of the present invention, the paper ejected by the paper ejection device may be either roll paper or cut paper. In the case of roll paper, when the receipt or ticket is issued, after the printing is completed, it is cut by the cutting means.

Further, in the paper discharge device of the present invention, the discharge buffering means buffers the discharge of the paper when the discharge is disturbed, and is constituted by a torque limiter as an example. In the case of this torque limiter, when the movement of the ejected paper is obstructed, the rotation force of the motor is stopped from being transmitted to the ejection roller, and when the obstruction of the ejection is released, the torque of the motor is reduced. The paper is discharged quickly by transmitting it to the discharge roller.

Further, in the paper discharge device of the present invention, the cutting of the paper by the cutting means may be carried out entirely or partially, for example, the paper is cut while leaving a part thereof. When the paper is cut while leaving a part of the paper, the recipient pulls out the continuous paper and tension is applied to the paper, so that the paper can be cut.

Further, in the paper discharge device of the present invention, after the paper is cut by the cutting means, the cutter blade is kept in a lowered state until the paper discharge is completed, so that the cut paper is conveyed. Can prevent the reversal state of
Stable paper ejection is possible.

Then, in the paper discharge device of the present invention,
The torque limiter is composed of a clutch portion, a motor, a gear, and a spring, and the clutch portion is attached to the drive shaft. The torque of the motor is transmitted to the clutch through the gear, and the frictional coupling between the clutch and the gear is due to the pressure contact force of the spring. When a load acts on the drive shaft and the load exceeds the pressure contact force of the spring,
The clutch part and the gears are in the idling state. The load on the drive shaft occurs when the sheet ejection is blocked. When the paper is strongly pulled out, the load causes the clutch to idle.

Further, in the paper discharge device of the present invention,
Instead of the spring of the torque limiter, frictional coupling between the gear and clutch can be realized by the adhesive force of the magnet,
Similarly, the clutch unit can be put in the idling state when the sheet discharge is hindered or when the sheet is forcibly discharged.

[0032]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

(First Embodiment) FIG. 1 is a first embodiment of a paper ejection device of the present invention, showing an outline of an issuing device used for issuing receipts, tickets and the like. This issuing device includes a printer device 2, a cutter device 4, and a paper discharge device 6. The printer device 2 is provided with a paper transport mechanism 8 and a print mechanism 10 for transporting print paper. The paper transport mechanism 8 includes transport rollers 12 and 14 that rotate by receiving a driving force from a motor (not shown). Further, the print mechanism 10 is provided with a print head 16 and a platen 18. Roll paper 22 for supplying the paper 20 to be printed is mounted on the printer device 2 side. The cutter device 4 cuts the paper 20 for which printing has been completed.

The paper discharge device 6 is a means for discharging the paper 20 conveyed from the cutter device 4 side,
A motor 26 as a driving means is installed on the side plate 24, and the rotational force of the motor 26 is transmitted to the torque limiter 30 via a worm gear 28 attached to the rotary shaft thereof.

Next, FIG. 2 shows a specific configuration example of the printer device 2, the cutter device 4, and the paper discharge device 6. The sheet 20 is conveyed along the sheet conveying path 32, that is, conveyed by the conveying rollers 12 and 14 of the sheet conveying mechanism 8 and guided between the print head 16 and the platen 18 of the printing mechanism 10. The printing operation on the paper 20 is performed in synchronization with the paper transportation by the transportation rollers 12 and 14.

The sheet 20 conveyed along with the printing is conveyed to the sheet discharge device 6 side through the cutter device 4. The cutter device 4 has a through hole 3 for passing the paper 20.
4, 36 are formed. The cutter device 4 is provided with a cutter blade 37 that slides in a direction orthogonal to the conveyed paper 20 and slides by receiving a driving force from a motor (not shown) in synchronization with the completion of printing to cut the paper 20. After the cutting, it returns to the illustrated position.

The sheet discharging device 6 has first and second guide plates 38 and 40 as means for guiding the sheet 20.
Is installed. One guide plate 38 has a chevron shape, a horizontal portion 42 is formed in an intermediate portion, and inclined portions 44 and 46 are formed in the front and rear thereof, and the other guide plate 40 is formed.
The inclined portions 50 and 52 are formed around the curved portion 48.

The inclined portion 44 of the guide plate 38 functions as an introducing portion that guides the conveyed paper 20 to the horizontal portion 42 side. To enhance the function as this introducing portion, the inclined portion 44 is provided on the upper surface side of the inclined portion 44. Is a guide piece 54 as an auxiliary guide means.
Is attached to the standing wall 56 of the sheet discharging device 6 to bridge the sheet conveying path 32 between the sheet discharging device 6 and the cutter device 4.

A space surrounded by the horizontal portion 42 of the guide plate 38, the inclined portion 50 of the guide plate 40, the side plate 24, and the standing wall 56 is formed, and the paper 20 being printed is curved to temporarily. A sheet storage unit 58 for storing is configured.

Also, the inclined portions 46 of the guide plates 38, 40,
Reference numerals 52 are arranged in parallel, and the parallel space portions form a sheet discharge path 60 that is inclined and descends from the horizontally set sheet conveyance path 32. The end portion of the paper discharge path 60 is the paper discharge port 62.

On the rear surface of the guide plate 38, the drive shaft 6 which receives the rotational force from the motor 26 via the torque limiter 30.
4. A support shaft 66 is installed on the back side of the guide plate 40. The arrangement relationship between the drive shaft 64 and the support shaft 66 is
The support shaft 66 is installed so as to sandwich the paper discharge path 60, and is displaced toward the paper discharge port 62 side with respect to the drive shaft 64. The support shaft 66 is supported by the bearing portion 86 and the locking portion 90 formed on the guide plate 40, and the opening 79 is formed in the guide plate 4.
It is formed by press working to form an L-shaped locking portion 90 formed by punching out 0.

As shown in FIG. 3, a pair of first discharge rollers 68 are attached to the drive shaft 64, and a pair of second discharge rollers 70 are in contact with the support shaft 66. Is rotatably supported. Further, since the respective roller surfaces of the respective discharge rollers 68 and 70 are brought into contact with each other, the guide plate 38 has a window portion 72 through which the discharge roller 68 is projected, and the guide plate 40 has a window portion 74 through which the discharge roller 70 is projected. Are formed respectively. That is, the roller surfaces of the discharge rollers 68 and 70 protruding through the windows 72 and 74 are in contact with each other. Also, the drive shaft 6
A motor 26 is connected to the motor 4 via a torque limiter 30 as a discharge buffering means for buffering the discharge of the paper. That is, the torque of the motor 26 is equal to the torque limiter 30.
Is transmitted from the drive shaft 64 to the discharge roller 68 via.
Therefore, the sheet 20 is sandwiched between the discharge rollers 68 and 70 and conveyed to the sheet discharge path 60 in a pressure contact state.

A paper sensor 76 is provided in the paper discharge path 60 as a means for detecting the arrival of the front end of the paper 20. The paper sensor 76 is installed on the back side of the guide plate 40, and its detection surface is a guide. It is directed from the window portion 78 of the plate 40 to the paper discharge path 60. This paper sensor 76 is
For example, the sheet discharge path 60 is configured by an optical detection unit, includes a light emitting element and a light receiving element, and emits light from the light emitting element.
The presence or absence of the reflected light from the paper 20 can be detected by receiving the reflected light from the paper 20 with the light receiving element.

Next, FIG. 4 is a sectional view taken along the line IV-IV of the paper discharge device shown in FIG. 2, showing a drive system for the discharge rollers 68 and 70. Motor 2 installed on side plate 24
A worm gear 28 is attached to the rotating shaft of 6, and the rotational force of the worm gear 28 causes the torque limiter 3 to rotate.
After being transmitted to 0, it is transmitted to the drive shaft 64 through the torque limiter 30. The drive shaft 64 is supported by bearings 82 and 84 attached to the side plate 24.

Next, FIG. 5 shows a structure for supporting the discharge roller 70 on the driven side. An appropriate pressure contact state is required between the discharge rollers 68 and 70 for pressure-feeding the paper 20.
Therefore, a metal shaft having elasticity is used as the support shaft 66 of the discharge roller 70.
The bearing shaft 86 is movably inserted into the groove portion 88 of the bearing portion 86, and the support shaft 66 is constrained so as not to separate from the groove portion 88 of the bearing portion 86. As a result, the discharge roller 68 comes into contact with the discharge roller 70 in a pressure contact state, and the discharge roller 70 is elastic in a range in which the support shaft 68 is allowed to move within the bearing portion 86 according to the discharged paper 20. Can be moved.

Next, FIG. 6 shows a specific configuration example of the torque limiter 30. Drive shaft 64 of discharge roller 68
Is supported by the side plate 24 through a bearing 82, and the side plate 2
4 protrudes to the outside. A clutch portion 92 is fixed to the drive shaft 64. The clutch portion 92 includes a small diameter portion 94 and a flange portion 96, and a gear 98 is rotatably provided on the small diameter portion 94. This gear 98 has
A recess 100 is formed in the axial direction, and a gear 98 is provided between the recess 100 and the disc-shaped spring receiver 102 fixed to the small diameter portion 94 of the clutch portion 92. The coil spring 104 for pressing against is inserted. A slip member 106 is attached to the flange portion 96 of the clutch portion 92, and the coil spring 10 is attached to the slip member 106.
The ring-shaped abutting portion 108 formed on the gear 98 is pressed against the gear 98 by the pressure of 4.

In such a torque limiter 30, the torque of the motor 26 is transmitted from the worm gear 28 to the gear 98. Normally, the pressure of the coil spring 104 causes the gear 98 and the clutch portion 92 to frictionally engage with each other, and as a result, the rotation of the gear 98 is transmitted to the drive shaft 64.

However, when a force that prevents rotation is exerted on the drive shaft 64 through the discharge roller 68, the blocking force acts on the pressure of the coil spring 104, the clutch portion 92 and the gear 9.
When the frictional force between the contact portion 108 and the contact portion 108 is exceeded, the gear 98 is in the idling state, and the transmission of the rotational force to the drive shaft 64 is blocked. As a result, the sheet 20 is formed by the discharge rollers 68 and 70.
Will be stopped. That is, when the ejection of the paper 20 is disturbed, the stress is passed through the paper 20 and the drive shaft 64
In addition, the gear 98 is caused to idle.

Next, FIG. 7 shows the configuration of the control device in the issuing device. A control unit 110 is installed in this control device as a means for controlling each of sheet conveyance, printing, sheet cutting, and sheet ejection. In this embodiment, the single control unit 110 controls paper printing and paper ejection, but these controls may be configured separately.

The control unit 110 is composed of, for example, a microcomputer in order to cooperate with the host computer 112 and execute various controls. The microprocessor (MPU) 114 as a central processing unit is
According to the program, various controls such as paper conveyance control, printing control, paper cutting control, paper ejection control and the like are performed. The MPU 114 has a timer 116 as a means for setting and controlling time.

A ROM 118 and a RAM 120 are installed as main storage means for storing the control program executed by the MPU 114 and data during control or calculation. The ROM 118 is a read-only memory having a control program, a table, etc., and the RAM 120 is an occasional write memory for storing data during calculation. Although not shown, a storage medium such as a flexible disk can be used instead of the RAM 120 as the auxiliary storage unit. Further, the storage means attached to the host computer 112 side can also be used as the auxiliary storage means of the control unit 110.

The control unit 110 also has an input / output unit (I / O) 1 as an input / output unit for fetching various input data from the host computer 112 and fetching control output of the control unit 110 from the host computer 112.
22 is provided. This I / O 122 is MPU1
14, ROM 118 and RAM 120 are linked via a bus. The I / O 122 is connected with a switch or the like for inputting an online operation command from the host computer 112 to the I / O 122 via the switch or the like.
The description is omitted because it is not directly related to the paper discharge control in the present invention.

The I / O 122 has first, second, third and fourth means as means for taking out the control output.
Drivers 124, 126, 128, and 130 are connected. The driver 124 is a drive output unit that supplies a drive output necessary for printing to the printer device 2, the driver 1
26 is a drive output means for supplying a drive output to the cutter device 4, a driver 128 is a drive output means for taking out a drive output of the motor 26 for discharging the paper, and the driver 13 is also provided.
Reference numeral 0 is a drive output means for extracting a display drive output for displaying an error on the display 132.

The printer device 2 includes a paper transport mechanism 8 and a printing mechanism 10. The paper carrying mechanism 8 is a means for carrying the paper 20 to be printed to the printing mechanism 10 side, and is composed of a carrying roller or the like that rotates a motor in synchronization with the printing operation and receives the rotation of the motor. The printing mechanism 10, based on the print data from the host computer 112,
It is a means for printing on the paper 20.

Next, description will be given of each operation of paper feeding, printing, paper cutting and paper discharging in this issuing device.

FIG. 8 and FIG. 9 show a program showing each operation of this paper conveyance, printing, paper cutting and paper discharge,
“A” indicates a connector.

After power is supplied to the control unit 110 or the reset switch is pressed to reset the control unit 110 to initialize the control unit 110, the printing operation is performed together with the sheet conveyance. In step S1, the paper sensor 76 detects the paper. If the paper 20 is detected, the program proceeds to step S2 to rotate the motor 26.

In step S3, the control unit 110 causes the motor 2
6, the drive time is measured from the start of driving, and the control unit 110
Determines whether a certain time has elapsed. If the fixed time has not elapsed, the program returns to step S2. As a result, the motor 26 will continue to be driven for a certain period of time, and will feed the paper 20 for a certain period of time.

Then, in step S4, the paper sensor 76
Detects the sheet 20 again. When the sheet 20 is detected, the process proceeds to step S5, the motor 26 is stopped, and then the process proceeds to step S6. In this case, since it is clear that an error has occurred, the display device 132 is turned on to display the error. With this display, the recipient is notified of a paper conveyance abnormality such as a jam occurrence.

When the paper 20 is not detected in step S4, the process proceeds to step S7, the rotation of the motor 26 is stopped, and then the process proceeds to step S8 to perform the printing operation. In step S8, one line is printed,
At 9, the paper is fed accordingly. This paper feed is 1
This is a line feed operation that corresponds to the printing of a line. In step S10, the motor 26 is rotated and the discharge operation of the paper 20 is started.

Then, in step S11, the sheet detection is performed again. If the sheet 20 is not detected, step S8 is performed.
Return to If the sheet 20 is detected, step S1
The process moves to 2 and the rotation of the motor 26 is stopped. Step S
In 13, the control unit 110 determines whether or not n lines are printed. If the n lines are not printed, the process proceeds to step S14 to print one line, and in step S15 the paper is fed by one line, and the process returns to step S13. . When n lines have been printed in step S13, that is, when the printing process is completed, step S1 is performed.
In step 6, the paper 20 is fed by m lines. Such feeding of the paper 20 by m lines is in preparation for cutting the paper, and the carrying operation is performed by the paper carrying mechanism 8.

In step S17, the paper 20 is cut, and the process proceeds to step S18. In step S18, the paper 20 is discharged, and the motor 26 is rotated. In step S19, sheet detection is performed, and if sheet 20 is detected, the process proceeds to step S20. Step S2
At 0, it is determined whether or not a fixed time has elapsed since the paper detection. Before the elapse of a certain time, step S1
Returning to step 8, the processes of steps S18 and S19 are performed. If it is determined in step S20 that the predetermined time has elapsed, the process proceeds to step S21, and paper detection is performed. When the sheet 20 is detected, the process proceeds to step S22, the motor 26 is stopped, and the step S22 is performed.
Then, the process proceeds to step 23 and the display 132 displays an error.

When the sheet 20 is not detected, that is, when the sheet 20 is discharged and the detection is completed, the process proceeds to step S24 and the motor 26 is stopped. When the motor 26 is stopped, the discharging operation of the paper 20 is completed, and the control unit 110 enters the standby state.

Next, FIG. 10 shows the printing of n lines and the feeding of m lines on the paper 20 in steps S8 to S13 and step S4, and the broken line 134 shows the cutting position. The portion 20A cut at the cutting position 134 is continuously discharged from the sheet discharge port 62, and the portion 20B is placed on the sheet conveying path 32 side of the cutter device 4.

Next, the printing operation and sheet conveyance will be described with reference to FIGS. 11, 12 and 13. FIG. 11 shows the printing operation after paper detection. In this case, when the paper is nipped and conveyed by the discharge rollers 68 and 70 which are rotated by the motor 26, the leading end portion thereof reaches below the paper sensor 76,
To be detected. At this time, the motor 26 is stopped and the paper 2
0 is held by being sandwiched between the discharge rollers 68 and 70.
That is, the discharge rollers 68 and 70 are in a standby state. At this time, the printing operation is continuously performed, and the paper 20 is carried out by the paper transport mechanism 8. At this time, the cutter device 4 is also in the standby state. Therefore, the paper 20 is transported through the paper transport path 32 in synchronization with the printing operation and is sent to the paper storage unit 58. That is, the discharge rollers 68, 70 are provided at the tip end side.
When the paper 20 is fed to the paper storage unit 58 in the state of being held at, the space is formed into a loop, and the loops 20a, 20b, and 20c are raised and formed according to the paper conveyance, and grow.

FIG. 12 shows cutting of the paper 20 after the printing operation is completed. After the printing operation is completed and the paper feeding for m lines is completed, the cutter device 4 operates. Cutter blade 3
7 is lowered, and as a result, the paper 20 is cut. After cutting the paper, the cutter blade 37 moves backward.

FIG. 13 shows the discharge of the sheet 20 after cutting. After cutting the paper 20, the motor 26 is driven and the paper 20 is rotated by the discharge rollers 68 and 70.
The paper is guided from the paper discharge path 60 to the paper discharge port 62 and continuously discharged. When the trailing edge of the ejected paper 20 deviates from the detection area of the paper sensor 76, a detection output indicating completion of ejection is obtained by the paper sensor 76 and applied to the controller 110, the motor 26 stops, and ejection is completed. To do. Then, the cut paper 20 becomes a plurality of paper pieces, which are issued to the recipient as a receipt or a ticket.

By the way, in the paper discharge device 6, as the discharge rollers 68 and 70, rollers having a relatively large diameter are used, and as shown in FIG. 14A, the discharge rollers 68 and 70 are used. With respect to the arrangement relationship, the central axis is inclined by an angle θ1. As a result, the opening angle formed by the tangent lines L1 and L2 of the discharge rollers 68 and 70 becomes θ2. That is, when the discharge rollers 68 and 70 have the same diameter and the inclination angle θ1 is 45 °, the opening angle θ2 is 90 °.

FIG. 14B shows the discharge rollers 68 and 70.
The figure shows a case where the central axes of are set at the same horizontal position. In this case, the opening angle θ3 formed by the tangents L1 and L2 is 4
5 °, the opening angles θ2, θ of the discharge rollers 68, 70
3 means that the opening angle is expanded by displacing the position of the central axis, that is, by setting the discharge roller 68 forward (θ2> θ3).

By arranging the discharge rollers 68 and 70 in this manner, in the paper discharge apparatus of the present invention, as shown in FIG.
As shown in FIG. 5, when the curled paper 20 indicated by the chain double-dashed line is conveyed due to the curl of the roll paper 22, the leading end of the curled paper 20 can be effectively guided between the discharge rollers 68 and 70. In particular, the discharge roller 68 moves in the direction indicated by the arrow P (that is,
Since the discharge roller 70 rotates in the clockwise direction) and the discharge roller 70 correspondingly rotates in the direction indicated by the arrow Q, the sheet 20 having its leading end in contact with the discharge roller 70 is guided to the discharge roller 68 side by the discharge roller 70. become. The rotation of the discharge rollers 68 and 70 and the opening angle θ2 of the discharge rollers 68 and 70 are combined to guide the paper 20 between the discharge rollers 68 and 70, and to ensure that the paper 20 is directed toward the paper discharge path 60 without causing a jam. Can be discharged to.

Next, FIG. 16 shows the operation in the case where the sheet discharge is blocked such as the sheet discharge port 62 is blocked.
In step S31, for example, when the sheet discharge port 62 is closed to prevent the sheet 20 from being conveyed, that is, to be discharged, the stress acting on the sheet 20 acts on the torque limiter 30 as shown in step S32. The torque limiter 30 is idling and the rotation of the discharge roller 68 is stopped.
As a result, the discharge of the paper 20 is stopped. Then, as shown in step S33, when the discharge prevention of the paper 20 is released, the stress release acts on the torque limiter 30,
As shown in step S34, the state is again transferred to the rotation transmission state, and the discharge of the sheet 20 is normally performed as in step S35.

By installing such a torque limiter 30, it is possible to set a driving force on the discharge roller 68 side that does not affect the printing accuracy of the printer device 2. Moreover, when the supply speed from the printer device 2 side and the paper discharge speed do not match, the discharge force can be absorbed by the torque limiter 30, and jamming can be prevented in advance.

(Second Embodiment) Next, FIG. 17 shows a second embodiment of the sheet discharging apparatus of the present invention. In this paper ejection device, the guide plate 38 is flat and has a slight inclined surface on the ejection side. In addition, the guide plate 40
Is an L-shape composed of slanted portions 136, 138, 140, and the slanted portion 136 serves as a wall surface of the paper storage unit 58.
The inclined portion 138 and the guide plate 38 side serve as an introduction portion for the sheet 20, and the inclined portion 140 forms the sheet discharge path 60. The discharge rollers 68 and 70 are installed at the entrance of the paper discharge path 60, and the discharge roller 70 is smaller than the discharge roller 68. Then, the drive shaft 64 of the discharge roller 68 is given a rotational force through the torque limiter 30 as in the first embodiment. Even with such a configuration, the smooth discharge of the paper 20 can be realized as in the first embodiment.

(Third Embodiment) Next, FIG. 18 shows a third embodiment of the sheet discharging apparatus of the present invention. This paper discharge device uses cut paper as the paper 20. In the sheet 20 made of such cut sheets, the stacker 142
The paper 20 to be printed and discharged is stored in the feeder 144
Are supplied to the conveying rollers 12 and 14 one by one.
In this case, the sheet 20 may be a continuous sheet that can be cut and has a stitch at the cut point.

(Fourth Embodiment) Next, FIG. 19 shows another configuration example of the torque limiter 30 as a fourth embodiment of the sheet discharging device of the present invention. Paper discharge device 6 of the first embodiment
In the torque limiter 30 used for the above, the pressure contact between the clutch portion 92 and the gear 98 is realized by using the coil spring 104. However, in this embodiment, the gear 98 and the clutch portion 92 are composed of a magnet, and both are magnetically coupled. The gear 98 can be brought into pressure contact with the clutch portion 92 with an appropriate pressure contact force. In this case, the gear 98
Is the retaining plate 1 fixed to the end of the clutch portion 92.
It is rotatably restrained on the small diameter portion 94 of the clutch portion 92 by 46. Even with the torque limiter 30 as described above, it is possible to wait for the discharge of the sheet 20 without causing a jam when the discharge of the sheet 20 is obstructed, and to promptly eject the sheet 20 at the same time when the ejection obstruction is canceled. .

(Other Embodiments) Next, other embodiments of the paper discharge device of the present invention will be enumerated as follows.

A. By increasing the rotation speed of the motor 26 as compared with the conveying speed on the sheet conveying side, it is possible to shorten the waiting time at the time of discharging the sheet.

B. The paper 20 may be cut, for example, as shown in FIG. 20, leaving a thin connecting portion 148 in the middle of the paper 20. In this way, the paper 20
Is held on the side of the printer device 2, so that the paper can be more stably transported or discharged on the paper path. By providing such a connecting portion 148, the paper 20 can be pulled out to the paper ejection device 6 side as the paper is ejected, and the user applies an appropriate tension to the paper 20 so that the paper 20 can be pulled out.
Can be easily cut at the connecting portion 148.

C. In the control of the cutter device 4, the inconvenience of the paper 20 returning to the paper supply source can be prevented by keeping the cutter blade 37 in the lowered state until the paper discharge is completed. If the paper sheet returns in the reverse direction, it will hinder the ejection of the next sheet, but the sheet ejection can be smoothed by such a method.

[0080]

As described above, according to the present invention,
The following effects can be obtained. a. Even if the leading edge of the conveyed sheet is curved in a loop shape, the sheet can be reliably pinched because the discharge roller can be pinched to the sheet at a large allowable angle.
Stable paper conveyance is possible, especially when the roll paper is used, even if curl or deformation due to pressure contact with the rollers on the conveyance means occurs, or if paper weakened by moisture absorption is conveyed reliably and smoothly. As a result, it is possible to stabilize the sheet conveyance, and it is possible to reliably prevent the occurrence of jams in the related art. b. Further, when the paper discharge is hindered, the torque limiter is idled to stop the paper discharge, and when the hindrance is released, the paper can be discharged, so that the reliability of the paper discharge and the occurrence of the jam can be prevented. . c. The paper to be printed and discharged can be stored in the paper storage means by curving in a loop shape, the paper can be discharged separately from the printing operation and the cutting operation, and interference with the paper discharge can be prevented. d. The paper can be discharged from both roll paper and cut paper. e. By using the torque limiter for the ejection buffering means, when the ejection of the sheet is disturbed, the ejection of the sheet can be put on standby, and when the interruption of the ejection is canceled, the sheet can be ejected promptly. f. The cutting of the paper by the cutting means can be performed entirely or partially, and when a part of the paper is left and cut,
When the recipient pulls out the continuous paper, tension is applied to the paper and the paper can be cut. g. If the cutter blade is not retracted until the paper discharge is completed after the paper is cut by the cutting means, it is possible to prevent the cut paper from returning to the transport side and to perform stable paper discharge. h. The torque limiter has a simple structure. When the obstruction at the time of ejecting the paper is stopped, the clutch section is idled to stop the ejection of the paper at the obstruction, and when the obstruction is released, the paper can be ejected quickly. i. The spring of the torque limiter can realize frictional coupling by using the adhesive force of the magnet, and similarly, when the sheet discharge is disturbed, the clutch section can be idled to protect the sheet discharge.

[Brief description of drawings]

FIG. 1 is a side view showing an issuing device which is a first embodiment of a paper ejection device of the present invention.

FIG. 2 is a cross-sectional view showing a paper discharge device in the issuing device shown in FIG.

FIG. 3 is a cutaway perspective view showing a paper storage unit and a discharge roller shown in FIG.

FIG. 4 is a sectional view taken along line IV-IV of the paper discharge device shown in FIG.

FIG. 5 is a diagram showing an elastic support structure of a discharge roller.

FIG. 6 is a vertical cross-sectional view showing a torque limiter.

FIG. 7 is a block diagram showing a control device of the paper discharge device.

FIG. 8 is a flowchart showing a control program for printing and paper discharge.

FIG. 9 is a flowchart showing a control program for printing and paper discharge.

FIG. 10 is a plan view showing a sheet.

FIG. 11 is a cross-sectional view showing the operation of the paper ejection device during printing.

FIG. 12 is a cross-sectional view of the paper ejection device during printing showing a paper storage state.

FIG. 13 is a cross-sectional view of the paper ejection device after printing is completed showing paper ejection.

14A and 14B show the arrangement of discharge rollers, FIG. 14A is a view showing the arrangement of discharge rollers according to the present invention, and FIG. 14B is a view showing the arrangement of other discharge rollers.

FIG. 15 is a diagram showing how the paper is bited into the discharge roller.

FIG. 16 is a flowchart showing an operation in the case of paper discharge prevention.

FIG. 17 is a cross-sectional view showing a second embodiment of the paper ejection device of the present invention.

FIG. 18 is a sectional view showing a third embodiment of the paper ejection device of the present invention.

FIG. 19 is a cross-sectional view showing another embodiment of the torque limiter in the paper ejection device of the present invention.

FIG. 20 is a plan view showing another embodiment of the paper to be discharged.

FIG. 21 is a perspective view showing a conventional printer device, and FIG. 21 (B) is a sectional view showing its internal structure.

FIG. 22 is a cross-sectional view showing a case where the ejected paper sheet is picked up and stands by.

FIG. 23 is a cross-sectional view showing the cutting of discharged paper, FIG. 23A is a cross-sectional view showing a case where tension is applied to the discharged paper, and FIG. It is a figure which shows a deformation | transformation.

[Explanation of symbols]

 2 Printer device 4 Cutting means 6 Paper discharging device 8 Conveying means 20 Paper 24 Side plate 26 Motor 30 Torque limiter (discharge buffering means) 38 First guide plate 40 Second guide plate 56 Standing wall 58 Paper storing means 60 Paper discharging path 62 Discharge port 64 Drive shafts 68, 70 First and second discharge rollers 76 Paper sensor 92 Clutch section 98 Gear 104 Spring 110 Control means (control section)

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[Procedure amendment]

[Submission date] December 30, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 4]

[Figure 5]

FIG. 16

FIG.

[Fig. 2]

[Figure 3]

[Figure 6]

FIG. 15

[Figure 7]

[Figure 10]

FIG. 11

FIG. 14

FIG. 18

[Figure 8]

[Fig. 12]

FIG. 20

[Figure 9]

[Fig. 13]

FIG. 17

FIG. 19

FIG. 22

FIG. 21

FIG. 23

Claims (9)

[Claims] 1. A paper ejecting device installed together with a printer device for ejecting printed paper, comprising: a conveying means for conveying a paper to be printed or a paper being printed, and the paper conveyed by the conveying means. A discharge roller that holds and holds the front end of the sheet, and discharges the sheet when printing is completed; a sheet storage unit that bends and stores the sheet held and conveyed by the discharge roller; A paper discharge path for guiding the paper discharged by the rollers to the discharge port side, a paper sensor for detecting that the leading end of the paper conveyed to the paper discharge path side by the discharge roller has arrived, and this paper sensor When the arrival of the paper is detected, the motor for driving the discharge roller is stopped and the paper conveying means is operated to operate the paper storage device. When the paper is sent to the step side and curled, the motor is driven upon completion of the printing operation to eject the paper, and when the paper sensor detects that the paper is ejected, the motor is stopped. The control means is attached to the drive shaft of the discharge roller to transmit the rotational force from the motor to the drive shaft, and when the sheet ejection is interrupted, idle to transmit the rotational force of the motor to the drive shaft. A paper ejecting device comprising: a paper ejecting buffering means for buffering paper ejection so as not to do so. 2. The first discharge roller attached to the drive shaft and installed under the paper discharge path, and the first discharge roller supported on the upper side of the paper discharge path. The sheet discharging device according to claim 1, further comprising a second discharging roller which is driven by the roller and is displaced from the first discharging roller to a sheet discharging port. 3. The paper storage means supports a first guide plate for supporting the paper to be discharged, a second guide plate installed above the first guide plate, and the drive shaft. The sheet ejecting device according to claim 1, wherein the sheet ejecting device is constituted by a side plate to be formed and an upright wall provided between the side plates. 4. The sheet ejecting apparatus according to claim 1, further comprising a cutting unit that cuts the printed sheet. 5. The discharge buffering means comprises a torque limiter for stopping the rotational force applied to the discharge roller by preventing the movement of the discharged paper.
The described paper ejection device. 6. The sheet discharging apparatus according to claim 4, wherein the cutting of the sheet by the cutting unit leaves a part of the sheet. 7. The sheet ejecting apparatus according to claim 4, wherein the cutting unit prevents the cutter blade from retracting until the sheet is completely ejected. 8. The torque limiter includes a clutch portion attached to the drive shaft, a gear rotatably attached to the clutch portion to which a rotational force is applied from a motor, and an abutment formed on the gear. The sheet ejection device according to claim 5, further comprising: a spring that presses a portion of the clutch portion against the clutch portion to transmit a rotational force. 9. The torque limiter includes a clutch portion formed of a magnet and attached to the drive shaft, and a gear formed of a magnet and rotatably attached to the clutch portion to which a rotational force from a motor is applied. 6. The sheet discharging device according to claim 5, wherein the gear and the clutch portion are coupled by an attraction force of the magnet.